1.	Determine which matrix is the 3 × 3 identity matrix.
		A.		B.
		C.		D.
		Hint
	2.	Find the inverse of
		A.		B.
		C.		D.
		Hint
	3.	Determine whether the pair of matrices are inverses.
		A.	yes, because A · B = I
		B.	yes, because each entry in the second matrix is the reciprocal of its corresponding entry in the first matrix
		C.	no, because A · B I
		D.	no, because fractions cannot be a part of an inverse
		Hint
	4.	Determine whether the pair of matrices are inverses.
		A.	yes, because each entry in the second matrix is the reciprocal of its corresponding entry in the first matrix.	B.	yes, because A · B = I.
		C.	no, because A · B I	D.	no, because fractions cannot be a part of an inverse
		Hint
	5.	Find the inverse of if it exists.
		A.		B.	does not exist, since ad – bc = 0
		C.		D.
		Hint